Backing up the complete joplin folder

Do I understand it correctly, that backing up the complete joplin folder (in my case on the nextcloud), I can restore the whole notes, right?

If you do not had a critical error before. I recommend to have several backups because it is not rare to encounter error after weeks or even months.

But this seems a manual (and thus easily forgotten) solution, right?
Thanks anyways for the confirmation.

If i know it right, an export as JEX is the recommended way.